Jeanette, maybe I was doing something wrong, but I tried this several times and it didn't work. 

This didn't work since the number of pages in each document must match and three blank pages at the end is unacceptable.

This problem has plagued me as well.  It is maddening that there is no way to insert or delete pages from within LiveCycle Designer.  But, I think I have a work around!Open the form in Adobe Acrobat.In the Document menu, select Extract Pages.Extract the first five pages of the document (or what ever...